21104113012 has 12 divisors (see below), whose sum is σ = 36937464480. Its totient is φ = 10550551736.

The previous prime is 21104113001. The next prime is 21104113027. The reversal of 21104113012 is 21031140112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344338 + ... + 400969.

It is an arithmetic number, because the mean of its divisors is an integer number (3078122040).

Almost surely, 2^21104113012 is an apocalyptic number.

It is an amenable number.

21104113012 is a deficient number, since it is larger than the sum of its proper divisors (15833351468).

21104113012 is a wasteful number, since it uses less digits than its factorization.

21104113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752390 (or 752388 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21104113012 its reverse (21031140112), we get a palindrome (42135253124).

The spelling of 21104113012 in words is "twenty-one billion, one hundred four million, one hundred thirteen thousand, twelve".